IADR Abstract Archives
Root Proximity to Nerve and Bone in Posterior Mandible
Objectives: To assess the proximity of the root apices of mandibular posterior teeth to the Inferior Alveolar Nerve (IAN) canal and cortical bone using Cone Beam Computed Tomography (CBCT), in a sample of Pakistani population.
Methods: A total of 106 scans were included using convenience sampling. ORTHOPHOSXG 3Dready/CEPH, SIRONA CBCT machine was employed for scans. Shortest linear distances from root apices of the mandibular posterior teeth to the superior border of the IAN canal and to the buccal cortex of the mandible, were measured on the GALAXIS Galileos Implant software. Descriptive statistics were computed using SPSS 23.0.
Results: The shortest distance recorded was from the root apex of the second premolar to the IAN canal, on the right side in males and on the left side in females. The shortest mean distance from the root apex to the buccal cortex was recorded for right first premolar in males and left second premolar in females. The distances measured among females were shorter than males for all mandibular posterior teeth. Independent sample t-test revealed that the distance from root to IAN canal differed significantly between the genders only on the left side (p≤0.05). No significant difference was observed for the distance between root apices and the buccal cortex (p≥0.05) between genders. Paired sample t-test revealed that the readings of right side were not different from left side (p≥0.05) . A weak positive correlation was found between the age and tooth to nerve distance (r ≤0.30) and root to buccal cortex (r ≤0.28).
Conclusions: Dental procedures in the second premolar can put the nerve at most risk of injury. Buccal cortex is the thinnest over the roots of the premolars. Females and individuals less than 41 years of age are most prone to injuries.
Methods: A total of 106 scans were included using convenience sampling. ORTHOPHOSXG 3Dready/CEPH, SIRONA CBCT machine was employed for scans. Shortest linear distances from root apices of the mandibular posterior teeth to the superior border of the IAN canal and to the buccal cortex of the mandible, were measured on the GALAXIS Galileos Implant software. Descriptive statistics were computed using SPSS 23.0.
Results: The shortest distance recorded was from the root apex of the second premolar to the IAN canal, on the right side in males and on the left side in females. The shortest mean distance from the root apex to the buccal cortex was recorded for right first premolar in males and left second premolar in females. The distances measured among females were shorter than males for all mandibular posterior teeth. Independent sample t-test revealed that the distance from root to IAN canal differed significantly between the genders only on the left side (p≤0.05). No significant difference was observed for the distance between root apices and the buccal cortex (p≥0.05) between genders. Paired sample t-test revealed that the readings of right side were not different from left side (p≥0.05) . A weak positive correlation was found between the age and tooth to nerve distance (r ≤0.30) and root to buccal cortex (r ≤0.28).
Conclusions: Dental procedures in the second premolar can put the nerve at most risk of injury. Buccal cortex is the thinnest over the roots of the premolars. Females and individuals less than 41 years of age are most prone to injuries.
